Home / 90,642,700.85-135,964,051.28-78,313,269.65

Finding the Fourth Proportional to 90,642,700.85, 135,964,051.28 and 78,313,269.65

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Solution

The fourth proportional to 90,642,700.85, 135,964,051.28 and 78,313,269.65 is: 117,469,904.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,642,700.85 : 135,964,051.28 = 78,313,269.65 : x
  2. Step 2: Convert to fraction form
    90,642,700.85/135,964,051.28 = 78,313,269.65/x
  3. Step 3: Cross multiply
    90,642,700.85x = 135,964,051.28 × 78,313,269.65
  4. Step 4: Simplify right side
    90,642,700.85x = 10,647,789,410,205,502
  5. Step 5: Solve for x
    x = 10,647,789,410,205,502/90,642,700.85
  6. Step 6: Final answer
    x = 117,469,904.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.